Model: TL-MR6400
Hardware Version: V4
Firmware Version: 1.10.0 0.9.1 v0001.0 Build 190521 Rel.38696n

Advanced/Security/Access Control - ON
Access Mode - Whitelist

I have added several devices to the MAC filtered whitelist.

After reaching the number of 31 devices added I have tried to add another one and got the following error:
Error code: 4728. The number of added entries has reached the limit.

Is it the restricion of 32 devices on whitelist and no more?
Is it possible to increase the limit of whitelist devices?